9931998053 has 2 divisors, whose sum is σ = 9931998054. Its totient is φ = 9931998052.

The previous prime is 9931998047. The next prime is 9931998061. The reversal of 9931998053 is 3508991399.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8440648129 + 1491349924 = 91873^2 + 38618^2 .

It is a cyclic number.

It is not a de Polignac number, because 9931998053 - 2¹⁰ = 9931997029 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 9931998053.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9931998073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4965999026 + 4965999027.

It is an arithmetic number, because the mean of its divisors is an integer number (4965999027).

Almost surely, 2^9931998053 is an apocalyptic number.

It is an amenable number.

9931998053 is a deficient number, since it is larger than the sum of its proper divisors (1).

9931998053 is an equidigital number, since it uses as much as digits as its factorization.

9931998053 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2361960, while the sum is 56.

The square root of 9931998053 is about 99659.4102581387. The cubic root of 9931998053 is about 2149.5400532607.

The spelling of 9931998053 in words is "nine billion, nine hundred thirty-one million, nine hundred ninety-eight thousand, fifty-three".